Year | Value | 2021 | 76.681 | 2020 | 77.874 | 2019 | 78.429 | 2018 | 78.153 | 2017 | 78.224 | 2016 | 78.43 | 2015 | 78.131 | 2014 | 77.934 | 2013 | 77.436 | 2012 | 77.205 | 2011 | 76.854 | 2010 | 76.572 | 2009 | 76.427 | 2008 | 75.873 | 2007 | 75.784 | 2006 | 75.952 | 2005 | 75.596 | 2004 | 74.791 | 2003 | 74.631 | 2002 | 74.339 | 2001 | 73.807 | 2000 | 73.583 | 1999 | 73.324 | 1998 | 73.091 | 1997 | 73.315 | 1996 | 73.42 | 1995 | 73.237 | 1994 | 72.682 | 1993 | 72.582 | 1992 | 72.489 | 1991 | 72.671 | 1990 | 72.685 | 1989 | 72.579 | 1988 | 72.552 | 1987 | 72.075 | 1986 | 72.416 | 1985 | 72.268 | 1984 | 71.724 | 1983 | 71.822 | 1982 | 71.605 | 1981 | 71.394 | 1980 | 70.644 | 1979 | 70.891 | 1978 | 70.412 | 1977 | 70.321 | 1976 | 69.829 | 1975 | 69.818 | 1974 | 69.497 | 1973 | 69.282 | 1972 | 69.079 | 1971 | 68.823 | 1970 | 68.493 | 1969 | 68.275 | 1968 | 67.673 | 1967 | 67.217 | 1966 | 67.173 | 1965 | 66.729 | 1964 | 66.185 | 1963 | 66.384 | 1962 | 65.907 | 1961 | 65.439 | 1960 | 65.181 |
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